Number of plants in records: 2,459,224 (January 2011)
Total of active accessions (acquisition records): 19,795
Number of taxa in permanent collections: 9,084
Families represented: 229
| Trees* | 13,613 |
| Shrubs* | 64,871 |
| Bulbs | 908,276 |
| Perennials* | 1,270,530 |
| Annuals** | 867 |
| Ground covers | 164,256 |
| Vines | 11,696 |
| Aquatics | 24,251 |
| Cyads | 29 |
| Cacti | 482 |
| Palms | 31 |
| Mosses | 58 |
| Epiphytes | 264 |
Statistics By Garden
| Aquatic Garden | 403 |
| Bulb Garden | 26,431 |
| Circle Garden | 1,682 |
| Dwarf Conifer Garden | 8,923 |
| Enabling Garden | 375 |
| English Walled Garden | 67,464 |
| Esplanade | 72,484 |
| Evening Island | 288,905 |
| Fruit & Vegetable Garden | 29,368 |
| The Greenhouses | 8,672 |
| Heritage Garden | 16,917 |
| Japanese Garden | 74,194 |
| Lakeside Gardens | 123,493 |
| Landscape Garden | 25,302 |
| McDonald Woods | 14,319 |
| Model Railroad | 3,819 |
| Native Plant Garden | 9,494 |
| Prairie & Marsh Island | 511,903 |
| Rose Garden | 39,095 |
| Sensory Garden | 72,825 |
| Shade Plant Evaluation Garden | 6,798 |
| Skokie River | 159,899 |
| Spider Island | 32,548 |
| Sun Plant Evaluation Garden | 4,120 |
| Waterfall Garden | 14,441 |
| WaterGardens/ Shorelines | 171,490 |
| West Flower Walk | 25,737 |
* These categories include tropical varieties.
** "Annuals" includes mostly self-seeding native plants. It does not include annual plants in seasonal displays.